Tender For purchase of m.s. seamless pipe and g.i. pipe - m.s. seamless, class b , size 20mm, m.s. seamless, class b , size 25mm, m.s. seamless, class b , size 50mm, m.s. seamless, class b , size 80mm, g.i. pipe, seamless, a-53 grade, size 15mm, g.i. pipe, seamless, a-53 grade, size 20mm, g.i. pipe, seamless, a-53 grade, size 25mm, g.i. pipe, seamless, a-53 grade, size 40mm